Standard: GB / T 1299-1985

● Features and application:

Measuring and cutting of steel, this steel, bearing steel composition and GCr6 rather, its hardenability, hardness and wear resistance than the high carbon tool steel, heat treatment size will not change much. Widely used as measuring tools, such as templates, card board, sample sets, gauge, block gauge, ring gauge, thread plug and sample columns, etc., can also be used to make drawing and cold heading die die die so cold and low-speed cutting tool does not too hard materials.

● Chemical Composition:

Carbon C: 0.95 ~ 1.10

Si Si: ≤ 0.40

Manganese Mn: ≤ 0.40

Sulfur S: ≤ 0.030

Phosphorus P: ≤ 0.030

Chromium Cr: 1.30 ~ 1.65

Ni: to allow the residual content of ≤ 0.25

Copper Cu: to allow the residual content of ≤ 0.30

● Mechanical Properties:

Hardness: Annealed, 229 ~ 179HB, indentation diameter of 4.0 ~ 4.5mm; quenching, ≥ 62HRC

● Heat treatment and microstructure specifications:

Standard heat treatment: quenching the sample 830 ~ 860 ℃, oil cooling.

● Delivery status: the status of delivery of steel to annealing.